diff --git a/ros2cli/completion/ros2-argcomplete.fish b/ros2cli/completion/ros2-argcomplete.fish
index 48b9f635a..e72102089 100644
--- a/ros2cli/completion/ros2-argcomplete.fish
+++ b/ros2cli/completion/ros2-argcomplete.fish
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 if type register-python-argcomplete3 > /dev/null 2>&1
-  eval "register-python-argcomplete3 --shell fish ros2 | ."
+  eval "register-python-argcomplete3 --shell fish ros2 | source"
 else if type register-python-argcomplete > /dev/null 2>&1
-  eval "register-python-argcomplete3 --shell fish ros2 | ."
+  eval "register-python-argcomplete3 --shell fish ros2 | source"
 end